WO2010055670A1 - Dispositif de conditionnement d'air - Google Patents

Dispositif de conditionnement d'air Download PDF

Info

Publication number
WO2010055670A1
WO2010055670A1 PCT/JP2009/006073 JP2009006073W WO2010055670A1 WO 2010055670 A1 WO2010055670 A1 WO 2010055670A1 JP 2009006073 W JP2009006073 W JP 2009006073W WO 2010055670 A1 WO2010055670 A1 WO 2010055670A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
outdoor
heat exchanger
defrosting operation
compressor
Prior art date
Application number
PCT/JP2009/006073
Other languages
English (en)
Japanese (ja)
Inventor
山田剛
小笠原哲哉
下田順一
Original Assignee
ダイキン工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to US13/128,500 priority Critical patent/US8707719B2/en
Priority to EP09825923.7A priority patent/EP2357434B1/fr
Priority to ES09825923.7T priority patent/ES2687260T3/es
Priority to AU2009315174A priority patent/AU2009315174B2/en
Priority to CN2009801424145A priority patent/CN102197269B/zh
Publication of WO2010055670A1 publication Critical patent/WO2010055670A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues
    • F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/01—Heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air

Definitions

  • the present invention relates to an air conditioner using a vapor compression refrigeration cycle.
  • the outdoor heat exchanger of the air conditioner functions as a refrigerant evaporator during heating operation, moisture contained in outdoor air is condensed on the surface of the outdoor heat exchanger.
  • frost formation on the outdoor heat exchanger is remarkable, and the frost formation range extends not only to the outdoor heat exchanger but also to the outdoor fan body, the bell mouth and fan guard around the outdoor fan. It extends.
  • frost covering the surface of an outdoor heat exchanger causes hot gas to be transferred to the outdoor heat exchanger during the defrosting operation. Melt by flowing.
  • frost attached to the outdoor heat exchanger can be melted, but attached to the outdoor fan body, the bell mouth and the fan guard around the outdoor fan, and the like. I could't melt the frost.
  • the subject of this invention is providing the air conditioning apparatus which can remove even the frost adhering to the apparatus and member located in the downstream of the airflow which heat-exchanges with an outdoor heat exchanger.
  • the air conditioner according to the first aspect of the present invention includes a refrigerant circuit, a switching valve, an outdoor fan, and a control unit.
  • the refrigerant circuit during the heating operation, the refrigerant circulates in the order of the compressor, the indoor heat exchanger, the decompression mechanism, and the outdoor heat exchanger.
  • the switching valve is connected to the refrigerant circuit and switches the flow direction of the refrigerant discharged from the compressor.
  • the outdoor fan sends air to the outdoor heat exchanger.
  • the control unit performs a defrosting operation control in which the outdoor fan is stopped and the refrigerant discharged from the compressor is directed to the outdoor heat exchanger by the switching valve.
  • control unit performs fan defrosting operation control for rotating the outdoor fan for a predetermined time while maintaining the operation in which the refrigerant discharged from the compressor is directed to the outdoor heat exchanger after completion of the defrosting operation when the predetermined condition is satisfied.
  • frost attached to the outdoor fan main body and its peripheral members for example, bell mouth and fan guard
  • this air conditioner as the outdoor fan rotates, the air passing through the outdoor heat exchanger whose temperature has risen becomes hot air and hits the outdoor fan main body and its peripheral members. Melts.
  • the air conditioner according to the second aspect of the present invention is the air conditioner according to the first aspect of the present invention, further comprising an outside air temperature sensor for measuring the outside air temperature.
  • the control unit executes fan defrosting operation control when the outside air temperature detected via the outside air temperature sensor is within a predetermined range. In this air conditioner, since the control unit determines whether to execute fan defrosting operation control according to the outside air temperature, useless fan defrosting operation is prevented.
  • An air conditioner according to a third aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein the control unit operates the compressor during fan defrosting operation control.
  • the temperature of the refrigerant flowing into the outdoor heat exchanger is maintained high by operating the compressor during fan defrosting operation control, so the temperature of warm air toward the outdoor fan body and its peripheral members is reduced. Is suppressed. As a result, the ability to defrost the outdoor fan main body and its peripheral members is improved.
  • An air conditioner according to a fourth aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein the control unit operates the compressor at a specific operating frequency lower than that during the defrosting operation during the fan defrosting operation control.
  • the control unit operates the compressor at a specific operating frequency lower than that during the defrosting operation during the fan defrosting operation control.
  • the operation frequency of the compressor during the fan defrosting operation is preferably low. Therefore, the operation after the fan defrosting operation is smoothly performed by setting the specific operation frequency prepared for the operation after the fan defrosting operation.
  • An air conditioner according to a fifth aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein a predetermined time can be selected at least at the initial setting at the installation location.
  • the length of time for which the fan defrosting operation control is performed is set to a time length suitable for the climatic conditions of the installation location of the air conditioner. A state in which frost remains on the peripheral members is avoided.
  • An air conditioner according to a sixth aspect of the present invention is the air conditioner according to the third or fourth aspect of the present invention, wherein the control unit stops the compressor before switching to the heating operation after the fan defrosting operation control is completed. .
  • the compressor is stopped before the heating operation, whereby the pressure in the refrigerant circuit is equalized and the switching to the heating operation is performed safely.
  • An air conditioner according to a seventh aspect of the present invention is the air conditioner according to the third or fourth aspect of the present invention, further comprising a refrigerant heating device that heats the refrigerant flowing through the refrigerant circuit.
  • a control part operates a refrigerant heating device at the time of fan defrost operation control.
  • the temperature of the refrigerant flowing into the outdoor heat exchanger is maintained high by operating the refrigerant heating device during fan defrosting operation control, so the temperature of the hot air toward the outdoor fan body and its peripheral members Reduction is suppressed. As a result, the ability to defrost the outdoor fan main body and its peripheral members is improved.
  • An air conditioner according to an eighth aspect of the present invention is the air conditioner according to the seventh aspect of the present invention, wherein the refrigerant heating device is an electromagnetic induction heater.
  • the refrigerant heating device is an electromagnetic induction heater.
  • the control unit determines whether to execute the fan defrosting operation control according to the outside air temperature, so that useless fan defrosting operation is prevented.
  • the temperature of the refrigerant flowing into the outdoor heat exchanger is maintained high by operating the compressor during fan defrosting operation control, so the temperature toward the outdoor fan body and its peripheral members is high. Wind temperature drop is suppressed.
  • the specific operation frequency provided for the operation after the fan defrosting operation is set, so that the operation after the fan defrosting operation is smoothly performed.
  • the length of time for which the fan defrosting operation control is performed is set to a time length suitable for the climatic conditions of the installation location of the air conditioner. A state in which frost remains on the outdoor fan body and its peripheral members is avoided.
  • the compressor since the compressor is operated during the fan defrosting operation control, the compressor circuit is stopped before the heating operation, so that the pressure in the refrigerant circuit is equalized and the heating operation is started. Switching is done safely.
  • the ability to defrost the outdoor fan body and its peripheral members is improved.
  • the piping is directly heated, so the temperature rise rate of the refrigerant is increased.
  • the refrigerant circuit figure of the air conditioning apparatus which concerns on one Embodiment of this invention.
  • the external appearance perspective view of the outdoor unit seen from the front side.
  • FIG. 1 is a configuration diagram of an air conditioner according to an embodiment of the present invention.
  • an outdoor unit 2 as a heat source side device and an indoor unit 4 as a usage side device are connected by a refrigerant pipe, and a refrigerant circuit 10 for performing a vapor compression refrigeration cycle is formed.
  • the outdoor unit 2 accommodates a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24, an accumulator 25, an outdoor fan 26, a hot gas bypass valve 27, a capillary tube 28, and an electromagnetic induction heating unit 6.
  • the indoor unit 4 houses an indoor heat exchanger 41 and an indoor fan 42.
  • the refrigerant circuit 10 includes a discharge pipe 10a, a gas pipe 10b, a liquid pipe 10c, an outdoor liquid pipe 10d, an outdoor gas pipe 10e, an accumulator pipe 10f, a suction pipe 10g, and a hot gas bypass 10h.
  • the discharge pipe 10 a connects the compressor 21 and the four-way switching valve 22.
  • the gas pipe 10 b connects the four-way switching valve 22 and the indoor heat exchanger 41.
  • the liquid pipe 10 c connects the indoor heat exchanger 41 and the expansion valve 24.
  • the outdoor liquid pipe 10 d connects the expansion valve 24 and the outdoor heat exchanger 23.
  • the outdoor gas pipe 10 e connects the outdoor heat exchanger 23 and the four-way switching valve 22.
  • the accumulator pipe 10 f connects the four-way switching valve 22 and the accumulator 25.
  • the electromagnetic induction heating unit 6 is attached to a part of the accumulator tube 10f.
  • the periphery of the copper tube is covered with a stainless steel tube.
  • the portion other than the stainless steel tube is a copper tube.
  • the suction pipe 10g connects the accumulator 25 and the suction side of the compressor 21.
  • the hot gas bypass 10h connects a branch point A1 provided in the middle of the discharge pipe 10a and a branch point D1 provided in the middle of the outdoor liquid pipe 10d.
  • the hot gas bypass valve 27 is arranged in the middle of the hot gas bypass 10h.
  • the controller 11 opens and closes the hot gas bypass valve 27 to switch the hot gas bypass 10h between a state where the refrigerant flow is allowed and a state where the hot gas bypass 10h is not allowed.
  • a capillary tube 28 for reducing the cross-sectional area of the refrigerant flow passage is provided downstream of the hot gas bypass valve 27, and the refrigerant flowing through the outdoor heat exchanger 23 and the hot gas bypass 10h during the defrosting operation.
  • the ratio of the refrigerant that circulates is kept constant.
  • the four-way switching valve 22 can switch between a cooling operation cycle and a heating operation cycle.
  • the connection state for performing the heating operation is indicated by a solid line
  • the connection state for performing the cooling operation is indicated by a dotted line.
  • the indoor heat exchanger 41 functions as a condenser
  • the outdoor heat exchanger 23 functions as an evaporator.
  • the outdoor heat exchanger 23 functions as a condenser
  • the indoor heat exchanger 41 functions as an evaporator.
  • FIG. 2 is an external perspective view of the outdoor unit viewed from the front side.
  • FIG. 2 is an external perspective view of the outdoor unit viewed from the front side.
  • the outer shell of the outdoor unit 2 is a top plate 2a, a bottom plate (invisible) facing the top plate 2a, a front panel 2c, a fan guard 2k, a right side panel 2f, and a left side panel facing the right side panel 2f.
  • a substantially rectangular parallelepiped shape is formed by the rear panel (invisible) facing the front panel 2c and the fan guard 2k.
  • FIG. 3 is a perspective view of the outdoor unit from which the front panel, the right side panel, and the back panel are removed.
  • the outdoor unit 2 is divided into a blower room and a machine room by a partition plate 2h.
  • An outdoor heat exchanger 23 and an outdoor fan are arranged in the blower room, and an electromagnetic induction heating unit 6, a compressor 21, and an accumulator 25 are arranged in the machine room.
  • FIG. 4 is a perspective view of the outdoor unit from which members other than the bottom plate, the outdoor heat exchanger, and the outdoor fan are removed.
  • the outdoor heat exchanger 23 is a fin-and-tube heat exchanger formed in an L shape.
  • Two outdoor fans 26 are arranged between the fan guard 2k (see FIG. 3) and the outdoor heat exchanger 23 so as to be adjacent to each other in the vertical direction via a support base. As the outdoor fan 26 rotates, outdoor air is sucked from the vents of the left side panel and the rear panel, passes between the fins of the outdoor heat exchanger 23, and is blown out from the fan guard 2k.
  • FIG. 5 is a plan view of the outdoor unit from which members other than the bottom plate and the machine room are removed.
  • the outdoor heat exchanger 23 is drawn by a two-dot chain line so that the position of the outdoor heat exchanger 23 can be understood.
  • the hot gas bypass 10h is arranged on the bottom plate 2b, extends from the machine room side where the compressor 21 is located to the blower room side, goes around the blower room side bottom, and returns to the machine room side. About half of the total length of the hot gas bypass 10 h is located below the outdoor heat exchanger 23.
  • FIG. 6 is a cross-sectional view of the electromagnetic induction heating unit.
  • the electromagnetic induction heating unit 6 is arranged so as to cover the heated portion of the accumulator tube 10f from the radially outer side, and heats the heated portion by electromagnetic induction heating.
  • the heated portion of the accumulator tube 10f has a double tube structure with an inner copper tube and an outer stainless steel tube 100f.
  • the stainless steel material used for the stainless steel pipe 100f is a ferritic stainless steel containing 16 to 18% chromium, or a precipitation hardening system containing 3 to 5% nickel, 15 to 17.5% chromium, and 3 to 5% copper. Stainless steel is selected.
  • the electromagnetic induction heating unit 6 is first positioned on the accumulator tube 10 f, then the vicinity of the upper end is fixed by the first hex nut 61, and finally the vicinity of the lower end is fixed by the second hex nut 66.
  • the coil 68 is spirally wound around the outside of the bobbin main body 65.
  • the coil 68 is accommodated inside the ferrite case 71.
  • the ferrite case 71 further accommodates a first ferrite part 69 and a second ferrite part 70.
  • the first ferrite portion 69 is formed of ferrite having a high magnetic permeability, and forms a path of magnetic flux together with the stainless steel tube 100f when a current is passed through the coil 68.
  • the first ferrite part 69 is located on both ends of the ferrite case 71.
  • the second ferrite portion 70 is different in position and shape from the first ferrite portion 69, but its function is the same as that of the first ferrite portion 69, and is disposed in the vicinity of the outside of the bobbin main body 65 in the accommodating portion of the ferrite case 71.
  • the air conditioner 1 can be switched to either the cooling operation or the heating operation by the four-way switching valve 22.
  • the four-way switching valve 22 is set to the state indicated by the dotted line in FIG.
  • the compressor 21 is operated in this state, the refrigerant circuit 10 performs a vapor compression refrigeration cycle in which the outdoor heat exchanger 23 serves as a condenser and the indoor heat exchanger 41 serves as an evaporator.
  • the high-pressure refrigerant discharged from the compressor 21 is condensed by exchanging heat with outdoor air in the outdoor heat exchanger 23.
  • the refrigerant that has passed through the outdoor heat exchanger 23 is decompressed when passing through the expansion valve 24, and then evaporates by exchanging heat with indoor air in the indoor heat exchanger 41. Then, the air whose temperature has decreased due to heat exchange with the refrigerant is blown out into the air conditioning target space.
  • the refrigerant that has passed through the indoor heat exchanger 41 is sucked into the compressor 21 and compressed.
  • the four-way switching valve 22 is set to the state shown by the solid line in FIG.
  • the compressor 21 When the compressor 21 is operated in this state, the refrigerant circuit 10 performs a vapor compression refrigeration cycle in which the outdoor heat exchanger 23 serves as an evaporator and the indoor heat exchanger 41 serves as a condenser.
  • the high-pressure refrigerant discharged from the compressor 21 is condensed by exchanging heat with indoor air in the indoor heat exchanger 41. Then, the air whose temperature has increased due to heat exchange with the refrigerant is blown out into the air-conditioning target space.
  • the condensed refrigerant is decompressed when passing through the expansion valve 24, and then evaporates by exchanging heat with outdoor air in the outdoor heat exchanger 23.
  • the refrigerant that has passed through the outdoor heat exchanger 23 is sucked into the compressor 21 and compressed.
  • the electromagnetic induction heating unit 6 heats the accumulator pipe 10f, so that the compressor 21 can compress the warmed refrigerant.
  • the temperature of the gas refrigerant discharged from the compressor 21 rises, and the lack of heating capacity at startup is compensated.
  • defrosting operation When the heating operation is performed, moisture contained in the air condenses on the surface of the outdoor heat exchanger 23, forms frost or freezes, covers the surface of the outdoor heat exchanger, and reduces the heat exchange performance. For this reason, defrosting operation is performed in order to melt frost or ice adhering to the outdoor heat exchanger 23. The defrosting operation is performed in the same cycle as the cooling operation.
  • the high-pressure refrigerant discharged from the compressor 21 is condensed by exchanging heat with outdoor air in the outdoor heat exchanger 23.
  • the frost or ice covering the outdoor heat exchanger 23 is melted by the heat radiation from the refrigerant.
  • the refrigerant which has dissipated heat and is condensed is reduced in pressure when passing through the expansion valve 24, and then is evaporated by exchanging heat with indoor air in the indoor heat exchanger 41. At this time, the indoor fan 42 is stopped. This is because when the indoor fan 42 is operated, the cooled air is blown into the air-conditioning target space and the comfort is impaired.
  • the refrigerant that has passed through the indoor heat exchanger 41 is sucked into the compressor 21 and compressed.
  • the electromagnetic induction heating unit 6 heats the accumulator tube 10f, so that the compressor 21 can compress the warmed refrigerant.
  • the temperature of the gas refrigerant discharged from the compressor 21 increases, and the defrosting capability is improved.
  • the high-pressure refrigerant discharged from the compressor 21 is also passed through the hot gas bypass 10h. Even when frost or ice grows on the bottom plate 2b of the outdoor unit 2, the ice is melted by heat radiation from the refrigerant passing through the hot gas bypass 10h. The water generated at that time is drained from the drain ports 86a to 86e.
  • the fan defrosting operation is an operation in which the outdoor fan 26 is rotated for a predetermined time after the defrosting operation is completed, and the frost attached to the outdoor fan 26 main body and its peripheral members is melted by the air that has passed through the outdoor heat exchanger 23.
  • FIG. 7 is a time chart before and after the fan defrosting operation of the air conditioner.
  • the fan defrosting operation is performed for a predetermined time with the operation frequency of the compressor 21 being set to a specific frequency lower than that during the defrosting operation while maintaining the refrigeration cycle during the defrosting operation.
  • the predetermined time is set to a time length suitable for the climatic conditions of the place where the air conditioner is installed. Specifically, the predetermined time can be set in three stages of 60 seconds, 80 seconds and 100 seconds. It is set via a setting button at the time of installation. As a result, a state in which frost remains on the outdoor fan 26 main body and its peripheral members after the fan defrosting operation control is avoided.
  • the predetermined time can be set at times other than when the air conditioner 1 is installed, and whether or not to set the fan defrosting operation to be performed can be set at times other than when the air conditioner 1 is installed.
  • the outdoor fan 26 rotates at a relatively low rotational speed.
  • the rotation speed of the outdoor fan 26 can be switched within a range of 1 to 8 steps (including stoppage), and the third step 3 from the lowest is selected during the fan defrosting operation.
  • the outdoor fan 26 is stopped during the defrosting operation performed before the fan defrosting operation.
  • the fan defrosting operation is not necessarily executed, but is executed when a predetermined condition is satisfied immediately before the start of the defrosting operation.
  • the defrosting operation is executed when the outside air temperature and the outdoor heat exchanger temperature are equal to or lower than preset temperatures after a certain time has elapsed since the previous defrosting operation.
  • the process is executed after the defrosting operation is completed.
  • the outside air temperature is measured via an outside air temperature sensor 102 attached to the outdoor unit 2.
  • the fan guard 2k is frosted as well as the outdoor heat exchanger 23.
  • the outdoor fan 26 is a propeller fan, if it is a type with a bell mouth around the propeller, the bell mass is also frosted. If the outdoor fan 26 is a turbo fan, the fan blades are also frosted. In such a state, even if the defrosting operation is completed, only the frost of the outdoor heat exchanger 23 is melted, and the frost attached to the fan guard 2k around the outdoor fan 26 is not melted.
  • the outdoor fan 26 since the outdoor fan 26 is operated by the fan defrosting operation, the air heated by the outdoor heat exchanger 23 is sent to peripheral members of the outdoor fan 26 body such as the outdoor fan 26 body and the fan guard 2k. Therefore, the frost attached to the fan guard 2k is also warmed and melted.
  • the compressor 21 since the compressor 21 is operating, the temperature of the refrigerant flowing into the outdoor heat exchanger 23 is maintained high, and the defrosting capability is increased. Furthermore, since the electromagnetic induction heating unit 6 heats the accumulator tube 10f, the compressor 21 can compress the warmed refrigerant, so that the temperature of the gas refrigerant discharged from the compressor 21 rises and outdoor heat exchange is performed. The temperature of the refrigerant flowing into the vessel 23 is further increased, and the defrosting capability is further increased. As a result, the time required to melt the frost is shortened. (Equal pressure operation) After the fan defrosting operation is completed, a pressure equalizing operation is performed in which the compressor 21 is stopped and the outdoor fan 26 is operated. In addition, when the fan defrosting operation is not performed, the pressure equalizing operation is performed after the defrosting operation is completed.
  • Step 6 is selected as the rotational speed of the outdoor fan 26 during the pressure equalizing operation, which is higher than that during the fan defrosting operation.
  • the purpose of the pressure equalization operation is to eliminate the high / low pressure difference in the refrigerant circuit 10 or to a predetermined value or less. In this embodiment, until the end of the fan defrosting operation, 80 seconds elapses, or The pressure equalizing operation is performed until the high-low pressure difference in the refrigerant circuit 10 becomes 0.49 MPa or less. If the refrigeration cycle is switched to the heating operation without performing the pressure equalization operation, devices such as the four-way switching valve 22 are adversely affected by the impact due to the high / low pressure difference in the refrigerant circuit 10.
  • the operating frequency of the compressor 21 before the pressure equalizing operation is low. For that reason, in the fan defrosting operation before the pressure equalizing operation, the operation frequency of the compressor 21 is set to a specific frequency lower than that during the defrosting operation.
  • the controller 11 defrosts the fan for operating the outdoor fan 26 for a preset time after the defrost operation is completed. Perform operation control. As a result, the frost attached to the outdoor fan 26 main body and its peripheral members (for example, the bell mouth and the fan guard) is melted.
  • the control unit 11 operates the compressor 21 at a specific operation frequency lower than that during the defrosting operation. As a result, the temperature of the refrigerant flowing into the outdoor heat exchanger 23 is maintained high, so that the temperature drop of the warm air toward the outdoor fan 26 main body and its peripheral members is suppressed.
  • control unit 11 stops the compressor 21 before switching to the heating operation, and performs a pressure equalizing operation that reduces the high-low pressure difference in the refrigerant circuit 10. As a result, switching to heating operation is performed safely.
  • an air conditioner for a cold region and a high humidity region.
  • Air Conditioner Electromagnetic Induction Heating Unit (Refrigerant Heating Device) DESCRIPTION OF SYMBOLS 10 Refrigerant circuit 11 Control part 21 Compressor 22 Four-way switching valve 23 Outdoor heat exchanger 24 Expansion valve (pressure reduction mechanism) 26 outdoor fan 42 indoor heat exchanger 102 outdoor temperature sensor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention porte sur un dispositif de conditionnement d'air capable de supprimer même le givre déposé sur un dispositif et sur un élément qui sont disposés en aval d'un écoulement d'air qui échange de la chaleur avec un échangeur de chaleur externe. Dans un dispositif de conditionnement d'air (1), en mode chauffage, un réfrigérant circule à travers un compresseur (21), une vanne de commutation à quatre voies (22), un échangeur de chaleur interne (41), un détendeur (24) et un échangeur de chaleur externe (23), dans cet ordre. En mode dégivrage, une section de commande (11) réalise une commande d'opération de dégivrage pour arrêter un ventilateur externe (26) et amener la vanne de commutation à quatre voies (22) à permettre au réfrigérant déchargé du compresseur (21) de s'écouler vers l'échangeur de chaleur externe (23), et, lorsqu'une condition prédéterminée est établie, la section de commande (11) réalise une commande d'opération de dégivrage de ventilateur pour permettre au ventilateur externe (26) de tourner pendant une période de temps prédéterminée après l'achèvement de l'opération de dégivrage.
PCT/JP2009/006073 2008-11-17 2009-11-13 Dispositif de conditionnement d'air WO2010055670A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US13/128,500 US8707719B2 (en) 2008-11-17 2009-11-13 Air conditioner
EP09825923.7A EP2357434B1 (fr) 2008-11-17 2009-11-13 Dispositif de conditionnement d'air
ES09825923.7T ES2687260T3 (es) 2008-11-17 2009-11-13 Procedimiento y sistema de carga rápida
AU2009315174A AU2009315174B2 (en) 2008-11-17 2009-11-13 Air conditioner
CN2009801424145A CN102197269B (zh) 2008-11-17 2009-11-13 空调装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-293141 2008-11-17
JP2008293141A JP4666061B2 (ja) 2008-11-17 2008-11-17 空気調和装置

Publications (1)

Publication Number Publication Date
WO2010055670A1 true WO2010055670A1 (fr) 2010-05-20

Family

ID=42169815

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/006073 WO2010055670A1 (fr) 2008-11-17 2009-11-13 Dispositif de conditionnement d'air

Country Status (8)

Country Link
US (1) US8707719B2 (fr)
EP (1) EP2357434B1 (fr)
JP (1) JP4666061B2 (fr)
KR (1) KR20110095361A (fr)
CN (1) CN102197269B (fr)
AU (1) AU2009315174B2 (fr)
ES (1) ES2687260T3 (fr)
WO (1) WO2010055670A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109654608A (zh) * 2019-02-18 2019-04-19 格力电器（杭州）有限公司 换热器的化霜结构及空调器

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2410257B1 (fr) * 2009-03-19 2018-08-29 Daikin Industries, Ltd. Climatiseur
US9835368B2 (en) * 2011-09-13 2017-12-05 Mitsubishi Electric Corporation Refrigerating and air-conditioning apparatus for use in a defrosting operation
US9239183B2 (en) 2012-05-03 2016-01-19 Carrier Corporation Method for reducing transient defrost noise on an outdoor split system heat pump
CN103162384B (zh) * 2013-03-04 2016-01-13 约克（无锡）空调冷冻设备有限公司 热泵运行的风机控制方法
JP6225548B2 (ja) * 2013-08-08 2017-11-08 株式会社富士通ゼネラル 空気調和装置
JP6119639B2 (ja) * 2014-02-27 2017-04-26 株式会社富士通ゼネラル 空気調和機
JP6134290B2 (ja) * 2014-04-24 2017-05-24 本田技研工業株式会社 車両用空調装置
CN105371524B (zh) * 2014-08-26 2018-03-20 青岛海尔空调器有限总公司 压缩式制冷制热空调系统及其室外机除霜方法
CN104833060B (zh) * 2015-05-22 2017-10-31 广东美的暖通设备有限公司 空调器的除霜控制方法和除霜控制装置
JP6528623B2 (ja) * 2015-09-24 2019-06-12 株式会社富士通ゼネラル 空気調和装置
KR101707617B1 (ko) * 2015-09-30 2017-02-21 삼성전자주식회사 공기 조화기 및 그 제어 방법
JP6610287B2 (ja) * 2016-01-26 2019-11-27 株式会社富士通ゼネラル 空気調和装置
JPWO2018029872A1 (ja) * 2016-08-12 2019-06-06 シャープ株式会社 空気調和機
CN108302651B (zh) * 2016-09-18 2020-09-04 苏州三星电子有限公司 一种多联机空调室外机系统及其除霜方法
EP3531045A1 (fr) * 2016-10-20 2019-08-28 GD Midea Heating & Ventilating Equipment Co., Ltd. Procédé et dispositif de dégivrage de climatiseur
CN107560217A (zh) * 2017-09-07 2018-01-09 珠海格力电器股份有限公司 热泵系统及其控制方法
JP6620800B2 (ja) * 2017-10-30 2019-12-18 ダイキン工業株式会社 空調装置
JP6965736B2 (ja) * 2017-12-27 2021-11-10 株式会社富士通ゼネラル 空気調和機
CN108800731A (zh) * 2018-05-09 2018-11-13 青岛海尔股份有限公司 蒸发器组件、具有该组件的冰箱及冰箱化霜控制方法
CN111189155A (zh) * 2018-11-15 2020-05-22 杭州先途电子有限公司 空调控制方法、装置、控制器及空调
CN114076385B (zh) * 2020-08-10 2023-12-26 海信空调有限公司 一种空调及空调室外机自动清洁方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629066U (fr) * 1985-07-01 1987-01-20
JPH04356647A (ja) * 1991-05-31 1992-12-10 Toshiba Corp 空気調和機の制御装置
JPH04366341A (ja) 1991-06-13 1992-12-18 Daikin Ind Ltd 空気調和装置
JPH0743051A (ja) * 1993-07-30 1995-02-10 Toshiba Corp 空気調和装置
JP2002333183A (ja) * 2001-05-08 2002-11-22 Daikin Ind Ltd 冷凍装置および冷凍装置のデータ書き込み方法
JP2004233015A (ja) * 2003-02-03 2004-08-19 Hitachi Ltd 空気調和機
JP2007051825A (ja) * 2005-08-18 2007-03-01 Matsushita Electric Ind Co Ltd 空気調和装置
JP2007255736A (ja) * 2006-03-20 2007-10-04 Daikin Ind Ltd 冷媒加熱装置および加熱制御方法
JP2008116156A (ja) * 2006-11-07 2008-05-22 Matsushita Electric Ind Co Ltd 空気調和装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010089909A (ko) 1998-12-07 2001-10-17 구자홍 공기조화기의 제상장치 및 제상방법
KR20010001013A (ko) 1999-06-01 2001-01-05 구자홍 공기조화기의 제상운전 방법
WO2007013382A1 (fr) * 2005-07-26 2007-02-01 Mitsubishi Electric Corporation Conditionneur d'air frigorifique
US20080190131A1 (en) * 2007-02-09 2008-08-14 Lennox Manufacturing., Inc. A Corporation Of Delaware Method and apparatus for removing ice from outdoor housing for an environmental conditioning unit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629066U (fr) * 1985-07-01 1987-01-20
JPH04356647A (ja) * 1991-05-31 1992-12-10 Toshiba Corp 空気調和機の制御装置
JPH04366341A (ja) 1991-06-13 1992-12-18 Daikin Ind Ltd 空気調和装置
JPH0743051A (ja) * 1993-07-30 1995-02-10 Toshiba Corp 空気調和装置
JP2002333183A (ja) * 2001-05-08 2002-11-22 Daikin Ind Ltd 冷凍装置および冷凍装置のデータ書き込み方法
JP2004233015A (ja) * 2003-02-03 2004-08-19 Hitachi Ltd 空気調和機
JP2007051825A (ja) * 2005-08-18 2007-03-01 Matsushita Electric Ind Co Ltd 空気調和装置
JP2007255736A (ja) * 2006-03-20 2007-10-04 Daikin Ind Ltd 冷媒加熱装置および加熱制御方法
JP2008116156A (ja) * 2006-11-07 2008-05-22 Matsushita Electric Ind Co Ltd 空気調和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2357434A4

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109654608A (zh) * 2019-02-18 2019-04-19 格力电器（杭州）有限公司 换热器的化霜结构及空调器

Also Published As

Publication number Publication date
CN102197269A (zh) 2011-09-21
US20110209488A1 (en) 2011-09-01
JP2010121789A (ja) 2010-06-03
US8707719B2 (en) 2014-04-29
JP4666061B2 (ja) 2011-04-06
AU2009315174B2 (en) 2012-12-13
CN102197269B (zh) 2013-11-06
AU2009315174A1 (en) 2011-06-23
KR20110095361A (ko) 2011-08-24
EP2357434B1 (fr) 2018-08-22
EP2357434A4 (fr) 2014-05-21
ES2687260T3 (es) 2018-10-24
EP2357434A1 (fr) 2011-08-17

Similar Documents

Publication Publication Date Title
JP4666061B2 (ja) 空気調和装置
JP5257462B2 (ja) 空気調和装置
RU2486413C1 (ru) Кондиционер
JP5177281B2 (ja) 空気調和装置
JP2011080733A (ja) 空気調和機
JP5071371B2 (ja) 空気調和装置
WO2016002009A1 (fr) Climatiseur
JP2001133088A (ja) 空気調和機
JP5315990B2 (ja) 空気調和装置およびその制御方法
JP2010127602A (ja) 冷凍装置
JP2010156490A (ja) 空気調和装置
KR102418657B1 (ko) 전기차용 공기조화장치
JP2010112611A (ja) 空気調和装置
JP7065279B2 (ja) 冷蔵庫
JP2010223454A (ja) 空気調和装置
JP7408942B2 (ja) 空気調和装置
JP2002061994A (ja) 空気調和機
JP2017156023A (ja) 空調装置
JP2626158B2 (ja) 空気調和機の運転制御装置
JP2014032009A (ja) 空気調和機

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200980142414.5

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09825923

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 13128500

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2009825923

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 20117013806

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2009315174

Country of ref document: AU

Date of ref document: 20091113

Kind code of ref document: A